Sheet processing device with sheet folding device to set a crease position and image forming system

Patent metadata

Field	Value
Publication number	US-10059558-B2
Application number	US-201514841815-A
Country	US
Kind code	B2
Filing date	Sep 1, 2015
Priority date	Sep 4, 2014
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A sheet processing device includes a conveying unit, a presser, an end detector, and a setting unit. The conveying unit conveys a sheet having a crease formed therein. The presser presses the crease in the sheet. The end detector detects an end in a conveying direction of the sheet at a position upstream of the presser in the conveying direction. The setting unit sets a crease position where the crease is to be formed. Upon detection of the end in the conveying direction, the conveying unit conveys the sheet to a position where the crease faces the presser, on the basis of the crease position set by the setting unit. The presser presses the crease in the conveyed sheet.

First claim

What is claimed is:

1. A sheet processing device comprising:
a folding unit configured to fold a sheet to form two or more creases in the sheet;
a conveyer configured to convey the sheet;
a presser downstream of the folding unit and configured to press the two or more creases in the sheet;
a sheet detector arranged on a downstream side of the folding unit and on an upstream side of the presser in a conveying direction of the sheet, and configured to detect a leading edge of the sheet; and
a setting unit configured to set press positions for creases, wherein
the two or more creases formed in the sheet include a first crease formed to align with one edge of the sheet in the conveying direction,
after the sheet detector detects the one edge of the sheet, the conveyer is configured to convey the sheet by a predetermined distance to a position where the first crease faces the presser, and the presser is configured to press the first crease in the conveyed sheet.

2. The sheet processing device of claim 1 , wherein in response to the first crease being formed on an end in the conveying direction of the sheet, the conveyer is configured to convey, upon detection of the end in the conveying direction, the sheet a distance between the sheet detector and the presser.

3. The sheet processing device of claim 1 , wherein in response to a crease being formed at a plurality of positions of the sheet and none of the creases is on an end of the sheet in the conveying direction, the conveyer is configured to convey, upon detection of the end in the conveying direction, the sheet a distance obtained by adding a distance between the sheet detector and the presser to a distance between the crease in the sheet and the end in the conveying direction.

4. The sheet processing device of claim 1 , wherein
the two or more creases includes a second crease formed upstream of the first crease in the conveying direction, and
the conveyer is configured to convey, after the presser presses the first crease, the sheet by a distance X, the distance X being a distance between the first crease and the second crease.

5. The sheet processing device of claim 1 , wherein the presser is configured to rotate about an axis lying in a direction parallel to the crease so as to press the crease gradually in the direction parallel to the crease.

6. An image forming system comprising:
an image forming apparatus configured to form an image on a sheet; and
the sheet processing device according to claim 1 , the sheet processing device being configured to press a crease in the sheet on which the image is formed by the image forming apparatus.

7. The sheet processing device of claim 1 , wherein the conveyer is configured to convey the sheet a distance, to the position where another crease faces the presser, the distance being variable based upon at least one of a fold type and a size of the conveyed sheet.

8. The sheet processing device of claim 1 , wherein the conveyer configured to convey the sheet at a relatively lower speed when the presser is pressing the sheet and is configured to convey the sheet a relatively higher speed when the presser is not pressing the sheet.

9. The sheet processing device of claim 1 , further comprising:
an end detector configured to detect an end in a conveying direction of the sheet at a position upstream of the presser in the conveying direction, wherein
upon detection of the end in the conveying direction, the conveyer is configured to convey the sheet a distance, to the position where another crease faces the presser.

10. The sheet processing device of claim 1 , wherein
the two or more creases further includes a second crease formed to align with another edge of the sheet in the conveying direction, and
after the sheet detector detects the another edge of the sheet, the conveyer is configured to convey the sheet by a predetermined distance so that the presser presses the second crease.

11. The sheet processing device according to claim 1 , wherein
the sheet further includes a second crease formed therein, and
a distance between the one edge of the sheet in the conveying direction and the second crease is larger than a distance between the first crease and another edge of the sheet.

12. The sheet processing device according to claim 1 , wherein the presser is independent of the folding unit.

13. The sheet processing device according to claim 1 , wherein the presser further includes a plate member facing the presser.

14. A sheet processing device comprising:
a conveyer configured to convey a sheet having a crease formed therein;
a presser configured to press the crease in the sheet;
an end detector configured to detect an end in a conveying direction of the sheet at a position upstream of the presser in the conveying direction;
a setting unit configured to set a crease position where the crease is to be formed, wherein upon detection of the end in the conveying direction, the conveyer is configured to convey the sheet to a position where the crease faces the presser, on the basis of the crease position set by the setting unit, and the presser is configured to press the crease in the conveyed sheet; and
a shifting unit configured to shift the presser in the conveying direction of the sheet,
wherein the shifting unit is configured to shift the presser to a position where the presser faces the crease, on the basis of the crease position set by the setting unit and a conveyance amount of the sheet conveyed by the conveyer,
the conveyer being configured to convey, upon detection of the end in the conveying direction, the sheet to the position where the crease faces the presser, on the basis of the crease position set by the setting unit and a shift amount of the presser shifted by the shifting unit, and
the presser being configured to press the crease in the conveyed sheet at a position to which the presser is shifted.

15. An image forming system comprising:
an image forming apparatus configured to form an image on a sheet; and
the sheet processing device according to claim 14 , the sheet processing device being configured to press a crease in the sheet on which the image is formed by the image forming apparatus.

16. The sheet processing device of claim 14 , wherein the conveyer is configured to convey the sheet a distance, to the position where another crease faces the presser, the distance being variable based upon at least one of a fold type and a size of the conveyed sheet.

17. The sheet processing device of claim 14 , wherein the conveyer configured to convey the sheet at a relatively lower speed when the presser is pressing the sheet and is configured to convey the sheet a relatively higher speed when the presser is not pressing the sheet.

18. A sheet processing device comprising:
a conveyer configured to convey a sheet;
a presser, configured to press a crease in the sheet,
a support plate to support a pressing roller and the sheet;
an end detector configured to detect an end of the sheet in a conveying direction, at a position upstream of the presser in the conveying direction; and
a setting unit configured to set a crease position where the crease is to be formed in the sheet,

wherein
the conveyer is configured to convey the sheet to a position where the crease faces the presser, on the basis of the crease position set by the setting unit,
the presser is configured to press the crease in the sheet upon the sheet being conveyed to a position where the crease faces the presser, and
in response to creases being formed at a

Assignees

• Suzuki Michitaka
• Furuhashi Tomohiro
• Hoshino Tomomichi
• Saito Satoshi
• Watanabe Takahiro
• Watanabe Takao
• Suzuki Yuji
• Ricoh Co Ltd

Inventors

• Suzuki Michitaka
• Furuhashi Tomohiro
• Hoshino Tomomichi
• Saito Satoshi
• Watanabe Takahiro
• Watanabe Takao
• Suzuki Yuji

Classifications

• B65H45/30 Primary

  Folding in combination with creasing, smoothing or application of adhesive (folding or adhesive application in article or web delivering B65H37/00) · CPC title

• B65H45/14 Primary

  Buckling folders · CPC title